B - Slave revolts.
The revolt of Spartacus, which was also the most famous slave uprising in the history of the Roman Empire, lead to questions about the usefulness and effectiveness of the current governmental system in Rome. This, along with other factors, made them plunge into a crisis which ended through the transition to an empire.
Answer:
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The government gets their power from the people who vote for their leadership.
Answer:
The answer would be : A. Tribes refused to stay on the failing reservations
The reservations refer to Government's effort to replace Indian land that has been acquired for them. But these reservations failed to fulfill the basic need of the Indians that was promised by the government so a couple of tribes refused to stay in it and demanded their land back